import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/login.vue'
import Home from '../components/home.vue'
import Welcome from '../components/welcome.vue'
import Users from '../components/user/users.vue'

Vue.use(VueRouter)

  const routes = [
    {
      path:'/',redirect:'/login'
    },
    {
      path: '/login',
      name: 'Login',
      component: Login
    },
    {
      path: '/home',
      name: 'Home',
      component: Home,
      redirect:'/welcome',
      children:[
        {
          path: '/welcome',
          name: 'Welcome',
          component: Welcome
        },
        {
          path:'/users',
          name:'Users',
          component:Users
        }
      ]
    }
]

const router = new VueRouter({
  routes
})
//挂载路由导航守卫
router.beforeEach((to,from,next)=>{
  //to将要访问的路径
  //from代表从哪个路径跳转而来
  //next是一个函数，表示放行
  //  next()放行  next('/login')强制跳转
  if(to.path === '/login') return next()
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if(!tokenStr) return next('/login')
  next()
})
export default router
